A.by opening the separator manually
B.by separating the lower part from the upper part automatically
C.by separating the upper part from the lower part automatically
D.continuously
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A.a centrifuge
B.an electric motor
C.a bowl assembly
D.a driving motor
A.centrifuging
B.pressurizing
C.atomization
D.igniting
A.no oxygen is needed
B.oxygen is necessary
C.oxygen is given off
D.no gas is produced
A.in the presence of oxygen
B.without oxygen
C.in the presence of nutrition
D.without nutrition
A.the bacteria
B.oxygen
C.oxidizing function
D.agitation function
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